A data set has 200 observations. In the data, a quantitative variable's highest value is 1080 and its lowest value is 960. What is the minimum class interval that you would recommend? Seleccione una A. The intermediate answer is 6 classes. The difference between the high and low is 120. So, the class interval is 10. B. The intermediate answer is 9 classes. The difference between the high and low is 120. So, the class interval is 20 C. The intermediate answer is 8 classes. The difference between the high and low is 120. So, the class interval is 15 D. The intermediate answer is 7 classes. The difference between the high and low is 120. So, the class interval is 5